<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>3D 立方体进度条</title>
</head>
<body>
<div class="demo-cube perspective percentage">
    <ul class="cube">
        <li class="top"></li>
        <li class="bottom"></li>
        <li class="front"></li>
        <li class="back"></li>
    </ul>
</div>

<div class="demo-cube perspective colorful">
    <ul class="cube">
        <li class="top"></li>
        <li class="bottom"></li>
        <li class="front"></li>
        <li class="back"></li>
    </ul>
</div>

<div class="demo-cube perspective pink">
    <ul class="cube">
        <li class="top"></li>
        <li class="bottom"></li>
        <li class="front"></li>
        <li class="back"></li>
    </ul>
</div>
</body>
</html>
